diff --git a/package-lock.json b/package-lock.json
index 7ddbda7ee..3e4d4ee6f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -347,6 +347,7 @@
               "version": "0.1.4",
               "bundled": true,
               "dev": true,
+              "optional": true,
               "requires": {
                 "kind-of": "^3.0.2",
                 "longest": "^1.0.1",
@@ -1475,7 +1476,8 @@
             "longest": {
               "version": "1.0.1",
               "bundled": true,
-              "dev": true
+              "dev": true,
+              "optional": true
             },
             "loose-envify": {
               "version": "1.3.1",
@@ -2925,6 +2927,7 @@
       "resolved": "https://registry.npmjs.org/align-text/-/align-text-0.1.4.tgz",
       "integrity": "sha1-DNkKVhCT810KmSVsIrcGlDP60Rc=",
       "dev": true,
+      "optional": true,
       "requires": {
         "kind-of": "^3.0.2",
         "longest": "^1.0.1",
@@ -2936,6 +2939,7 @@
           "resolved": "https://registry.npmjs.org/kind-of/-/kind-of-3.2.2.tgz",
           "integrity": "sha1-MeohpzS6ubuw8yRm2JOupR5KPGQ=",
           "dev": true,
+          "optional": true,
           "requires": {
             "is-buffer": "^1.1.5"
           }
@@ -6023,12 +6027,14 @@
         "balanced-match": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "brace-expansion": {
           "version": "1.1.11",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "balanced-match": "^1.0.0",
             "concat-map": "0.0.1"
@@ -6043,17 +6049,20 @@
         "code-point-at": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "concat-map": {
           "version": "0.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "console-control-strings": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "core-util-is": {
           "version": "1.0.2",
@@ -6170,7 +6179,8 @@
         "inherits": {
           "version": "2.0.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "ini": {
           "version": "1.3.5",
@@ -6182,6 +6192,7 @@
           "version": "1.0.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "number-is-nan": "^1.0.0"
           }
@@ -6196,6 +6207,7 @@
           "version": "3.0.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "brace-expansion": "^1.1.7"
           }
@@ -6203,12 +6215,14 @@
         "minimist": {
           "version": "0.0.8",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "minipass": {
           "version": "2.2.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "safe-buffer": "^5.1.1",
             "yallist": "^3.0.0"
@@ -6227,6 +6241,7 @@
           "version": "0.5.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "minimist": "0.0.8"
           }
@@ -6307,7 +6322,8 @@
         "number-is-nan": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "object-assign": {
           "version": "4.1.1",
@@ -6319,6 +6335,7 @@
           "version": "1.4.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "wrappy": "1"
           }
@@ -6440,6 +6457,7 @@
           "version": "1.0.2",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "code-point-at": "^1.0.0",
             "is-fullwidth-code-point": "^1.0.0",
@@ -6693,10 +6711,11 @@
       }
     },
     "google-gax": {
-      "version": "0.17.1",
-      "resolved": "https://registry.npmjs.org/google-gax/-/google-gax-0.17.1.tgz",
-      "integrity": "sha512-fAKvFx++SRr6bGWamWuVOkJzJnQqMgpJkhaB2oEwfFJ91rbFgEmIPRmZZ/MeIVVFUOuHUVyZ8nwjm5peyTZJ6g==",
+      "version": "0.18.0",
+      "resolved": "https://registry.npmjs.org/google-gax/-/google-gax-0.18.0.tgz",
+      "integrity": "sha512-cF2s3aTw1cWDHsjaYfIizJZT0KJF0FSM3laiCX4O/K0ZcdmeE9PitG2bxRH+dY+Sz094//m+JoH1hBtSyOf67A==",
       "requires": {
+        "@grpc/proto-loader": "^0.3.0",
         "duplexify": "^3.6.0",
         "extend": "^3.0.1",
         "globby": "^8.0.1",
@@ -6705,9 +6724,27 @@
         "grpc": "^1.12.2",
         "is-stream-ended": "^0.1.4",
         "lodash": "^4.17.10",
-        "protobufjs": "^6.8.6",
+        "protobufjs": "^6.8.8",
         "retry-request": "^4.0.0",
         "through2": "^2.0.3"
+      },
+      "dependencies": {
+        "@grpc/proto-loader": {
+          "version": "0.3.0",
+          "resolved": "https://registry.npmjs.org/@grpc/proto-loader/-/proto-loader-0.3.0.tgz",
+          "integrity": "sha512-9b8S/V+3W4Gv7G/JKSZ48zApgyYbfIR7mAC9XNnaSWme3zj57MIESu0ELzm9j5oxNIpFG8DgO00iJMIUZ5luqw==",
+          "requires": {
+            "@types/lodash": "^4.14.104",
+            "@types/node": "^9.4.6",
+            "lodash": "^4.17.5",
+            "protobufjs": "^6.8.6"
+          }
+        },
+        "@types/node": {
+          "version": "9.6.25",
+          "resolved": "https://registry.npmjs.org/@types/node/-/node-9.6.25.tgz",
+          "integrity": "sha512-uZpzO9MKSHy7zBiTtziA3JgZP3upcAvLTASkKgheLj6/rNZmRX4UyvsFYaY2kbYcmmh8bNZ2T0eocBRCfZdGvQ=="
+        }
       }
     },
     "google-p12-pem": {
@@ -8369,7 +8406,8 @@
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/longest/-/longest-1.0.1.tgz",
       "integrity": "sha1-MKCy2jj3N3DoKUoNIuZiXtd9AJc=",
-      "dev": true
+      "dev": true,
+      "optional": true
     },
     "loose-envify": {
       "version": "1.4.0",
@@ -8942,6 +8980,7 @@
           "version": "0.1.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "kind-of": "^3.0.2",
             "longest": "^1.0.1",
@@ -9884,7 +9923,8 @@
         "longest": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "lru-cache": {
           "version": "4.1.3",
diff --git a/package.json b/package.json
index 7b2c4a135..8c6b84a13 100644
--- a/package.json
+++ b/package.json
@@ -66,7 +66,7 @@
     "escape-string-regexp": "^1.0.5",
     "extend": "^3.0.0",
     "google-auth-library": "^1.6.1",
-    "google-gax": "^0.17.1",
+    "google-gax": "^0.18.0",
     "is": "^3.0.1",
     "is-utf8": "^0.2.1",
     "lodash.flatten": "^4.2.0",